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| * @Id: curs_pad.3x,v 1.14 2005/05/15 16:18:43 tom Exp @ |
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| <TITLE>curs_pad 3x</TITLE> |
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| <H1>curs_pad 3x</H1> |
| <HR> |
| <PRE> |
| <!-- Manpage converted by man2html 3.0.1 --> |
| <STRONG><A HREF="curs_pad.3x.html">curs_pad(3x)</A></STRONG> <STRONG><A HREF="curs_pad.3x.html">curs_pad(3x)</A></STRONG> |
| |
| |
| |
| |
| </PRE> |
| <H2>NAME</H2><PRE> |
| <STRONG>newpad</STRONG>, <STRONG>subpad</STRONG>, <STRONG>prefresh</STRONG>, <STRONG>pnoutrefresh</STRONG>, <STRONG>pechochar</STRONG>, |
| <STRONG>pecho_wchar</STRONG> - create and display <STRONG>curses</STRONG> pads |
| |
| |
| </PRE> |
| <H2>SYNOPSIS</H2><PRE> |
| <STRONG>#include</STRONG> <STRONG><curses.h></STRONG> |
| |
| <STRONG>WINDOW</STRONG> <STRONG>*newpad(int</STRONG> <STRONG>nlines,</STRONG> <STRONG>int</STRONG> <STRONG>ncols);</STRONG> |
| <STRONG>WINDOW</STRONG> <STRONG>*subpad(WINDOW</STRONG> <STRONG>*orig,</STRONG> <STRONG>int</STRONG> <STRONG>nlines,</STRONG> <STRONG>int</STRONG> <STRONG>ncols,</STRONG> |
| <STRONG>int</STRONG> <STRONG>begin_y,</STRONG> <STRONG>int</STRONG> <STRONG>begin_x);</STRONG> |
| <STRONG>int</STRONG> <STRONG>prefresh(WINDOW</STRONG> <STRONG>*pad,</STRONG> <STRONG>int</STRONG> <STRONG>pminrow,</STRONG> <STRONG>int</STRONG> <STRONG>pmincol,</STRONG> |
| <STRONG>int</STRONG> <STRONG>sminrow,</STRONG> <STRONG>int</STRONG> <STRONG>smincol,</STRONG> <STRONG>int</STRONG> <STRONG>smaxrow,</STRONG> <STRONG>int</STRONG> <STRONG>smaxcol);</STRONG> |
| <STRONG>int</STRONG> <STRONG>pnoutrefresh(WINDOW</STRONG> <STRONG>*pad,</STRONG> <STRONG>int</STRONG> <STRONG>pminrow,</STRONG> <STRONG>int</STRONG> <STRONG>pmincol,</STRONG> |
| <STRONG>int</STRONG> <STRONG>sminrow,</STRONG> <STRONG>int</STRONG> <STRONG>smincol,</STRONG> <STRONG>int</STRONG> <STRONG>smaxrow,</STRONG> <STRONG>int</STRONG> <STRONG>smaxcol);</STRONG> |
| <STRONG>int</STRONG> <STRONG>pechochar(WINDOW</STRONG> <STRONG>*pad,</STRONG> <STRONG>chtype</STRONG> <STRONG>ch);</STRONG> |
| <STRONG>int</STRONG> <STRONG>pecho_wchar(WINDOW</STRONG> <STRONG>*pad,</STRONG> <STRONG>const</STRONG> <STRONG>cchar_t</STRONG> <STRONG>*wch);</STRONG> |
| |
| |
| </PRE> |
| <H2>DESCRIPTION</H2><PRE> |
| The <STRONG>newpad</STRONG> routine creates and returns a pointer to a new |
| pad data structure with the given number of lines, <EM>nlines</EM>, |
| and columns, <EM>ncols</EM>. A pad is like a window, except that |
| it is not restricted by the screen size, and is not neces- |
| sarily associated with a particular part of the screen. |
| Pads can be used when a large window is needed, and only a |
| part of the window will be on the screen at one time. Au- |
| tomatic refreshes of pads (e.g., from scrolling or echoing |
| of input) do not occur. It is not legal to call <STRONG>wrefresh</STRONG> |
| with a <EM>pad</EM> as an argument; the routines <STRONG>prefresh</STRONG> or |
| <STRONG>pnoutrefresh</STRONG> should be called instead. Note that these |
| routines require additional parameters to specify the part |
| of the pad to be displayed and the location on the screen |
| to be used for the display. |
| |
| The <STRONG>subpad</STRONG> routine creates and returns a pointer to a sub- |
| window within a pad with the given number of lines, |
| <EM>nlines</EM>, and columns, <EM>ncols</EM>. Unlike <STRONG>subwin</STRONG>, which uses |
| screen coordinates, the window is at position (<EM>begin</EM>_<EM>x</EM><STRONG>,</STRONG> |
| <EM>begin</EM>_<EM>y</EM>) on the pad. The window is made in the middle of |
| the window <EM>orig</EM>, so that changes made to one window affect |
| both windows. During the use of this routine, it will of- |
| ten be necessary to call <STRONG>touchwin</STRONG> or <STRONG>touchline</STRONG> on <EM>orig</EM> be- |
| fore calling <STRONG>prefresh</STRONG>. |
| |
| The <STRONG>prefresh</STRONG> and <STRONG>pnoutrefresh</STRONG> routines are analogous to |
| <STRONG>wrefresh</STRONG> and <STRONG>wnoutrefresh</STRONG> except that they relate to pads |
| instead of windows. The additional parameters are needed |
| to indicate what part of the pad and screen are involved. |
| <EM>pminrow</EM> and <EM>pmincol</EM> specify the upper left-hand corner of |
| the rectangle to be displayed in the pad. <EM>sminrow</EM>, <EM>smin-</EM> |
| <EM>col</EM>, <EM>smaxrow</EM>, and <EM>smaxcol</EM> specify the edges of the rectan- |
| gle to be displayed on the screen. The lower right-hand |
| corner of the rectangle to be displayed in the pad is cal- |
| culated from the screen coordinates, since the rectangles |
| must be the same size. Both rectangles must be entirely |
| contained within their respective structures. Negative |
| values of <EM>pminrow</EM>, <EM>pmincol</EM>, <EM>sminrow</EM>, or <EM>smincol</EM> are treat- |
| ed as if they were zero. |
| |
| The <STRONG>pechochar</STRONG> routine is functionally equivalent to a call |
| to <STRONG>addch</STRONG> followed by a call to <STRONG>refresh</STRONG>, a call to <STRONG>waddch</STRONG> |
| followed by a call to <STRONG>wrefresh</STRONG>, or a call to <STRONG>waddch</STRONG> fol- |
| lowed by a call to <STRONG>prefresh</STRONG>. The knowledge that only a |
| single character is being output is taken into considera- |
| tion and, for non-control characters, a considerable per- |
| formance gain might be seen by using these routines in- |
| stead of their equivalents. In the case of <STRONG>pechochar</STRONG>, the |
| last location of the pad on the screen is reused for the |
| arguments to <STRONG>prefresh</STRONG>. |
| |
| The <STRONG>pecho_wchar</STRONG> function is the analogous wide-character |
| form of <STRONG>pechochar</STRONG>. It outputs one character to a pad and |
| immediately refreshes the pad. It does this by a call to |
| <STRONG>wadd_wch</STRONG> followed by a call to <STRONG>prefresh</STRONG>. |
| |
| |
| </PRE> |
| <H2>RETURN VALUE</H2><PRE> |
| Routines that return an integer return <STRONG>ERR</STRONG> upon failure |
| and <STRONG>OK</STRONG> (SVr4 only specifies "an integer value other than |
| <STRONG>ERR</STRONG>") upon successful completion. |
| |
| Routines that return pointers return <STRONG>NULL</STRONG> on error, and |
| set <STRONG>errno</STRONG> to <STRONG>ENOMEM</STRONG>. |
| |
| X/Open does not define any error conditions. In this im- |
| plementation |
| |
| <STRONG>prefresh</STRONG> and <STRONG>pnoutrefresh</STRONG> |
| return an error if the window pointer is null, |
| or if the window is not really a pad or if the |
| area to refresh extends off-screen or if the |
| minimum coordinates are greater than the maxi- |
| mum. |
| |
| <STRONG>pechochar</STRONG> |
| returns an error if the window is not really a |
| pad, and the associated call to <STRONG>wechochar</STRONG> re- |
| turns an error. |
| |
| <STRONG>pecho_wchar</STRONG> |
| returns an error if the window is not really a |
| pad, and the associated call to <STRONG>wecho_wchar</STRONG> |
| returns an error. |
| |
| |
| </PRE> |
| <H2>NOTES</H2><PRE> |
| Note that <STRONG>pechochar</STRONG> may be a macro. |
| |
| |
| </PRE> |
| <H2>PORTABILITY</H2><PRE> |
| The XSI Curses standard, Issue 4 describes these func- |
| tions. |
| |
| |
| </PRE> |
| <H2>SEE ALSO</H2><PRE> |
| <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_refresh.3x.html">curs_refresh(3x)</A></STRONG>, <STRONG><A HREF="curs_touch.3x.html">curs_touch(3x)</A></STRONG>, <STRONG>curs_add-</STRONG> |
| <STRONG><A HREF="curs_addch.3x.html">ch(3x)</A></STRONG>. |
| |
| |
| |
| <STRONG><A HREF="curs_pad.3x.html">curs_pad(3x)</A></STRONG> |
| </PRE> |
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